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You cannot connect two Office 365 accounts in one Outlook profile at the same time

You cannot connect two Office 365 accounts in one Outlook profile at the same time

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Some customers find that if they try to configure two or more Office 365 accounts in one Outlook profile, these accounts cannot all connect to the Exchange Online Server at the same time, even though you have configured them correctly. For example, you have (default account) and configured, when is connected to the server, you cannot get connected.

This issue may occur intermittently.


To resolve this issue, use the Add-RecipientPermission cmdlet to add SendAs permission to the default account. To do so, use the following steps:

  1. Connect Windows PowerShell to the Office 365 Online Service


For detailed steps, visit Use Windows PowerShell in Exchange Online .


      2.  Run the cmdlet that resembles the following. Please be noted that is the default account in Outlook.


$target_giving = ''

$user_getting = ''

Add-MailboxPermission –Identity $target_giving -User $user_getting -AccessRights FullAccess -InheritanceType All
Add-RecipientPermission $target_giving -Trustee $user_getting -AccessRights SendAs

Note:  More details about Add-RecipientPermission cmdlet


IF this method does not resolve this issue, welcome to leave a comment here, or follow up on the original post .

  • Have you tried using the Windows transfer wizard to transfer them between profiles? THink of the old and new profiles as computers, and you can just transfer them accross.

  • Does anybody know why this happens with 3 mailbox on the same Outlook, but is only with a few PCs, in others PCs everything is working fine.

  • How about and accounts both are running on office365

  • I'd also like to know about Seppo.... is this still a problem if you are connecting to two separate tenants, i.e. and ?

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