I ended up doing an export to PST in the Exchange Admin CentreĪnd then imported it into a new mailbox on a new user. That had access to it (even when you ignored the login prompt) after I tried to Issue came to a head on Tuesday when the mailbox stopped working for anyone Hi All, thank you for your advice regarding this issue. If you need any more information let me know. They are using on-premises Exchange 2016 and Outlook 2016Ĭlients. Mailbox, create a new one, link it to the same AD user account and import the Unless IĬan fix it, I can only think to export the contents to a PST, delete the I check the AD user account of the UPN hadn’tīeen disabled or password expired.

The UPN on Mailbox A is different to that of theĪlias/primary SMTP address but this shouldn’t matter.

Password rather than getting the settings via AutoDiscover. Mailbox A and attempt to configure a new Outlook profile, it prompts for a If I login to another computer as the user assigned to Permission to mailbox A and set the profile up again or disable auto-mapping It points to an issue with mailbox A - when I remove They can then use Outlook and access mailbox A After clicking on this and pressing cancel again Once you select cancel, “Password required” appears in the bottom

It is asking for their credentials and not that of Permission to mailbox A (currently 4-5 users) is getting a password promptĪppear when opening Outlook. Mailboxes (let’s call this “mailbox A”) whereby anyone who has Full Access I am currently experiencing an issue with one of my user’s

Outlook 2016 send as another user