000-581: mailboxes

Author: PowershellScripts

articles/en/Other/mailbox.md

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+---
+layout: page
+title: 'Exchange Online: What mailboxes User has access to?'
+hero_image: '/img/IMG_20220521_140146.jpg'
+menubar: docs_menu
+show_sidebar: false
+hero_height: is-small
+date: '2024-12-30'
+---
+
+The article describes a way how to verify user's access rights to other people's mailboxes.
+
+##  Check who has access to a single mailbox
+
+In order to check who has access to a single mailbox, run the following cmdlet:
+
+
+```powershell
+Get-MailboxPermission -Identity arleta
+```
+
+arleta - identity of the mailbox, e.g. arleta@testova365.onmicrosoft.com
+
+In the screenshot below you can see that user2@testova365.onmicrosoft.com has FullAccess rights on the mailbox. But how to check which and how many mailboxes user2 has access to?
+
+<img src="/articles/img/mail.png" width="600" > 
+
+
+<br/><br/>
+
+## Check what mailboxes a user has access to
+
+There is no direct cmdlet, but we can loop through all the existing mailboxes and verify specific user's rights:
+
+
+```powershell
+$mailboxes =  Get-Mailbox -Resultsize Unlimited
+
+foreach($mailbox in $mailboxes){
+    Get-MailboxPermission -Identity $mailbox.Identity -User user2@testova365.onmicrosoft.com
+    }
+```
+
+<img src="/articles/img/mail2.png" width="600" > 
+
+The AccessRights columns display the access level to each individual mailbox.  User's own mailbox will not be displayed.
+
+<br/><br/>
+
+## Export to CSV
+The report on user's permissions can be exported to a CSV file:
+
+
+```powershell
+foreach($mailbox in $mailboxes){
+    Get-MailboxPermission -Identity $mailbox.Identity -User user2@testova365.onmicrosoft.com | export-csv c:\maiperms.csv -Append
+    }
+
+```
+
+<br/><br/>
+
+## Other Languages
+This article is available in other languages:
+
+Exchange Online: Do jakich skrzynek użytkownik ma dostęp? (pl-PL)
+Exchange Online: lister les boîtes aux lettres auxquelles un utilisateur a accès (fr-FR)