Have a very strangle issue that I hope some of you could help with? I have a user with Outlook 2013 running 3 hosted exchange accounts. Has been working fine for 6 months but when he sends or replies to 3 separate external users in his contacts list, Outlook 2013 quits and restarts.
I have repaired/re-installed Office 365. This hasn't helped.
I've deleted the 3 contacts from his contact listing, send them e-mails via typing in the addresses manually and they send OK.
If I add these contacts back to his contacts listing and send again - Outlook quits and restarts.
Any idea greatly appreciated.