Outlook 2016 won't load mailbox from O365

[newpersn]

I have a user when he opens outlook it won't connect to his mailbox.

 

I tired deleting and recreating the mailbox profile and still no luck. Outlook claims there is a connection issue. It asks for password for the mailbox and errors out.

 

I login as a test user and it works fine. (Same OU) its also following him around (Local Profiles) He can access his emails on outlook.office.com. Just outlook being a pain.

 

(Exchane 2016 hybrid. Mailbox is in O365)

[Roberto]

I have a user when he opens outlook it won't connect to his mailbox.

 

I tired deleting and recreating the mailbox profile and still no luck. Outlook claims there is a connection issue. It asks for password for the mailbox and errors out.

 

I login as a test user and it works fine. (Same OU) its also following him around (Local Profiles) He can access his emails on outlook.office.com. Just outlook being a pain.

 

(Exchane 2016 hybrid. Mailbox is in O365)

 

Does OWA work? New outlook/mapi profile has the same issue? Test connections? Any issues with them & other o365 services? Tested with the tools at https://testconnectivity.microsoft.com/tests/o365 ?

[bknaggs]

Any chance to install Office 2019 or 365 and try one of those?

[newpersn]

Fixed the issue.

 

Problem with mailbox permission. Deleted the user from the mailbox and resigned it and its working.