{"id":101050,"date":"2022-06-09T14:53:54","date_gmt":"2022-06-09T14:53:54","guid":{"rendered":"https:\/\/www.stellarinfo.com\/blog\/?p=101050"},"modified":"2025-11-27T05:00:09","modified_gmt":"2025-11-27T05:00:09","slug":"how-to-fix-error-publicfoldersizeexceedstargetquotaexception","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.com\/blog\/how-to-fix-error-publicfoldersizeexceedstargetquotaexception\/","title":{"rendered":"How to Fix Error Public Folder Size Exceeds Target Quota Exception?"},"content":{"rendered":"<?xml encoding=\"utf-8\" ?><?xml encoding=\"utf-8\" ?><p>PublicFolderSizeExceedsTargetQuotaException is an error message that appears when you try to migrate Public Folders from your on-premises Exchange Server to Exchange Online (Microsoft 365 or Office 365). The complete error message reads as follows:<\/p><pre class=\"wp-block-code command_container\"><code><em>PFMBX01 Error: PublicFolderSizeExceedsTargetQuotaException: Error: Source public folder size 123456345567 exceeds target Mailbox quota. Permissible target Mailbox quota is 134698962360. Original target Mailbox quota is 114675435421.<\/em><\/code><\/pre><p>As clear from the message, the error appears when the source public folder size exceeds the maximum public folder size quota on the target server during the migration. &nbsp;<\/p><p>In this blog, you will learn the ways to fix the PublicFolderSizeExceedsTargetQuotaException error and <a href=\"https:\/\/www.stellarinfo.com\/blog\/migrate-public-folder-to-office-365\/\">migrate your Public Folders to Office 365<\/a> or Exchange Online with complete integrity.<\/p><h2 class=\"wp-block-heading\" id=\"methods-to-fix-publicfoldersizeexceedstargetquotaexception-error\"><strong>Methods to Fix PublicFolderSizeExceedsTargetQuotaException Error<\/strong><\/h2><p>To resolve the PublicFolderSizeExceedsTargetQuotaException error, you can apply the following solutions:<\/p><ol style=\"list-style-type:1\" class=\"wp-block-list\">\n<li>Increase the default public folder quota on the target server (Office 365).<\/li>\n\n\n\n<li>Increase public folder mailbox item size limit on the target server.<\/li>\n<\/ol><p>Below we have discussed these solutions in detail with step-by-step instructions.<\/p><h3 class=\"wp-block-heading\"><strong>1. Increase Public Folder Size Quota on Office 365<\/strong><\/h3><p>The default public folder size or setting in Microsoft 365 or Office 365 is 2 GB. Also, a warning is issued when the public folder size exceeds 1.7 GB.<\/p><p>If the public folder size on the source server is larger, you must increase the public folder size quota on the target Microsoft 365 tenant. You can increase the quota limit to any size, but we recommend keeping it 50 GB or 100 GB (based on your Office 365 or Microsoft 365 plan).<\/p><p>In our case, we will increase the public folder quota to 50 GB and set the issue warning size to 45 GB. The steps are as follows:<\/p><p><strong>Step 1:<\/strong> On your Exchange source server or Windows PC, open the <strong>PowerShell<\/strong> as administrator and run the following command:<\/p><pre class=\"wp-block-code command_container\"><code><code>$UserCredential = Get-Credential<\/code><\/code><\/pre><p><strong>Step 2:<\/strong> <strong>Enter <\/strong>the global administrator&rsquo;s Office 365 or Microsoft 365 <strong>login credentials<\/strong> and click <strong>OK<\/strong>.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"638\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Microsoft-365-login-credentials.png\" alt=\"Microsoft 365 login credentials | PublicFolderSizeExceedsTargetQuotaException\" class=\"wp-image-101106 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Microsoft-365-login-credentials.png 975w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Microsoft-365-login-credentials-300x196.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Microsoft-365-login-credentials-768x503.png 768w\" sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/figure>\n<\/div><p><strong>Step 3:<\/strong> <strong>Run <\/strong>the following command to use the <strong>Office 365<\/strong> global administrator login credentials to establish a connection and start a session.<\/p><pre class=\"wp-block-code command_container\"><code><code>$Session = New-PSSession -ConfigurationName Microsoft.Exchange-ConnectionUri https:\/\/ps.outlook.com\/powershell\/ -Credential $UserCredential -Authentication Basic -AllowRedirection<\/code>\n<code>Import-PSSession $Session<\/code><\/code><\/pre><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"222\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Import-PSSession-Session.png\" alt=\"Import-PSSession $Session\" class=\"wp-image-101107 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Import-PSSession-Session.png 975w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Import-PSSession-Session-300x68.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Import-PSSession-Session-768x175.png 768w\" sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/figure>\n<\/div><p><strong>Step 4:<\/strong> If you receive an error, <strong>run <\/strong>the following command to <strong>set execution policy<\/strong>.<\/p><pre class=\"wp-block-code command_container\"><code><code>Get-ExecutionPolicy<\/code>\n<code>Set-ExecutionPolicy RemoteSigned<\/code>\nPress <strong>Y<\/strong> and then hit the <strong>Enter <\/strong>key to confirm.<\/code><\/pre><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"261\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Set-ExecutionPolicy-RemoteSigned.png\" alt=\"Set-ExecutionPolicy RemoteSigned\" class=\"wp-image-101109 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Set-ExecutionPolicy-RemoteSigned.png 975w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Set-ExecutionPolicy-RemoteSigned-300x80.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Set-ExecutionPolicy-RemoteSigned-768x206.png 768w\" sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/figure>\n<\/div><p><strong>Step 5:<\/strong> You can <strong>run <\/strong>the previous commands to <strong>start <\/strong>the remote session once done.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"360\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/start-the-remote-session.png\" alt=\"start the remote session\" class=\"wp-image-101112 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/start-the-remote-session.png 975w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/start-the-remote-session-300x111.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/start-the-remote-session-768x284.png 768w\" sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/figure>\n<\/div><p><strong>Step 6:<\/strong> <strong>Run <\/strong>the following command to <strong>check <\/strong>the current public folder limit.<\/p><pre class=\"wp-block-code command_container\"><code><code>Get-OrganizationConfig | fl *DefaultPublicFolder*<\/code><\/code><\/pre><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"964\" height=\"395\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Get-OrganizationConfig.png\" alt=\"Get-OrganizationConfig\" class=\"wp-image-101113 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Get-OrganizationConfig.png 964w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Get-OrganizationConfig-300x123.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Get-OrganizationConfig-768x315.png 768w\" sizes=\"auto, (max-width: 964px) 100vw, 964px\" \/><\/figure>\n<\/div><p><strong>Step 7:<\/strong> As you can see, the public folder <strong>limit is set to 2 GB<\/strong>. To increase the default public folder quota limit, execute the following <strong>command<\/strong>.<\/p><pre class=\"wp-block-code command_container\"><code><code>Set-OrganizationConfig -DefaultPublicFolderProhibitPostQuota 50GB -DefaultPublicFolderIssueWarningQuota 45GB<\/code><\/code><\/pre><p><strong>Step 8:<\/strong> Then check the <strong>new limit<\/strong>:<\/p><pre class=\"wp-block-code command_container\"><code>Get-OrganizationConfig | fl *DefaultPublicFolder*<\/code><\/pre><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"283\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Get-OrganizationConfig-limit.png\" alt=\"Get-OrganizationConfig limit\" class=\"wp-image-101114 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Get-OrganizationConfig-limit.png 975w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Get-OrganizationConfig-limit-300x87.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/Get-OrganizationConfig-limit-768x223.png 768w\" sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/figure><p><strong>Step 9:<\/strong> You may also <strong>set <\/strong>the quota to <strong>unlimited<\/strong>.<\/p><pre class=\"wp-block-code command_container\"><code><code>Set-OrganizationConfig -DefaultPublicFolderProhibitPostQuota Unlimited -DefaultPublicFolderIssueWarningQuota Unlimited<\/code><\/code><\/pre><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"213\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/DefaultPublicFolderProhibitPostQuota-1.png\" alt=\"Stellar\" class=\"wp-image-101116 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/DefaultPublicFolderProhibitPostQuota-1.png 975w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/DefaultPublicFolderProhibitPostQuota-1-300x66.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/DefaultPublicFolderProhibitPostQuota-1-768x168.png 768w\" sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/figure>\n<\/div><h3 class=\"wp-block-heading\"><strong>2. Increase Public Folder Mailbox Items Size Limit on Office 365<\/strong><\/h3><p>Similar to the public folder mailbox quota, the mailbox items size limit can also prevent you from migrating the public folders and lead to the PublicFolderSizeExceedsTargetQuotaException error. Increasing the public folder mailbox item size limit may prevent this or similar errors during public folder migration. Follow these steps:<\/p><p><strong>Step 1: <\/strong>In the same PowerShell window, <strong>run <\/strong>the following <strong>command <\/strong>to check the current limits.<\/p><pre class=\"wp-block-code command_container\"><code><code>Get-Mailbox -PublicFolder | ft Name,MaxSendSize,MaxSendSize<\/code><\/code><\/pre><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"309\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/check-the-current-limit.png\" alt=\"check the current limit | PublicFolderSizeExceedsTargetQuotaException\" class=\"wp-image-101118 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/check-the-current-limit.png 975w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/check-the-current-limit-300x95.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/check-the-current-limit-768x243.png 768w\" sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/figure><p>As you can see, it&rsquo;s set to 35 MB. This means any mail item in a public folder exceeding 35 MB may not be migrated or result in an error.<\/p><p><strong>Step 2: <\/strong>Execute the following command to increase the <strong>MaxSendSize<\/strong> and <strong>MaxReceiveSize<\/strong> to the maximum limit. This will allow you to migrate mail items up to 150 MB in size. Any mail item exceeding this limit will not be migrated.<\/p><pre class=\"wp-block-code command_container\"><code><code>Get-Mailbox -PublicFolder | Set-Mailbox -PublicFolder -MaxReceiveSize 150MB -MaxSendSize 150MB<\/code><\/code><\/pre><p><strong>Step 3:<\/strong> Check the new limit for the public folder mailbox item size.<\/p><pre class=\"wp-block-code command_container\"><code><code>Get-Mailbox -PublicFolder | ft Name,MaxSendSize,MaxSendSize<\/code><\/code><\/pre><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"216\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/new-limit-for-the-public-folder-mailbox-item-size.png\" alt=\"new limit for the public folder mailbox item size\" class=\"wp-image-101119 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/new-limit-for-the-public-folder-mailbox-item-size.png 975w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/new-limit-for-the-public-folder-mailbox-item-size-300x66.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/06\/new-limit-for-the-public-folder-mailbox-item-size-768x170.png 768w\" sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/figure>\n<\/div><blockquote class=\"note_alert\">\n<p><em><strong>Bonus Tip: <\/strong>You may also backup or move mail items from your public folders and then delete those items from the public folders to reduce the size.&nbsp;<\/em><\/p>\n<\/blockquote><h2 class=\"wp-block-heading\" id=\"conclusion\"><strong>Conclusion<\/strong><\/h2><p>By following the solutions discussed in this blog, you can easily fix the <strong>PublicFolderSizeExceedsTargetQuotaException<\/strong> error. However, if the issue persists or you need to migrate large public folders or mail items, use a reliable <a href=\"https:\/\/www.stellarinfo.com\/exchange-migration.php\">Exchange migration tool<\/a> such as <strong>Stellar Migrator for Exchange<\/strong>. This software simplifies the process of migrating mailboxes, public folders, and archive data from on-premises Exchange to <strong>Office 365<\/strong> or another Exchange Server. With its intuitive interface and automated workflow, you can perform large-scale mailbox migrations efficiently and securely. It ensures complete data integrity, minimal downtime, and a hassle-free Exchange to Office 365 migration experience.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PublicFolderSizeExceedsTargetQuotaException is an error message that appears when you try to migrate&hellip; <a class=\"more-link\" href=\"https:\/\/www.stellarinfo.com\/blog\/how-to-fix-error-publicfoldersizeexceedstargetquotaexception\/\">Continue reading <span class=\"screen-reader-text\">How to Fix Error Public Folder Size Exceeds Target Quota Exception?<\/span><\/a><\/p>\n","protected":false},"author":32,"featured_media":101052,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2960],"tags":[2917,2916,2915],"class_list":["post-101050","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-migrate-to-office-365","tag-office-365-migration-mailbox-size-exceeds-target-quota","tag-public-folder-migration-error","tag-publicfoldersizeexceedstargetquotaexception","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Fix Error Public Folder Size Exceeds Target Quota Exception?<\/title>\n<meta name=\"description\" content=\"Resolve the &quot;Public Folder Size Exceeds Target Quota&quot; error effortlessly with our expert tips and step-by-step guidance. 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