If you can’t access a Mailbox with the following Error Message.
MAPI_E_FAILONEPROVIDER and Mailbox Permissions
Its most like the Mailbox Permisson for the Admin User is corrupted or false.
To set the a clean Permission:
- you need to open the Exchange Management Shell cmdlet and put the following Powershell code in (replace Domain with your Domain):
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Remove-MailboxPermission -Identity "Administrator" -User "Domain\Organization Management" -AccessRights FullAccess -deny:$true |
2. After this you set the permission new:
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Add-MailboxPermission -Identity "Administrator" -User "Domain\Organization Management" -AccessRights FullAccess -InheritanceType All |
Now your Administrator has Full Access to the Mailbox.
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