Essentially a user offers to share their calendar with another, and also checks to box to request access to the receivers mailbox.  When the receiver gets the mail and clicks "Allow" Outlook locks up stops responding. You have to either wait for Windows to kill the process or do it yourself in the task manager.  Has happened to all users that I've tested it on now.

I posted this originally in the Exchange forum by recommendations of someone, the Exchange forum told me to come here.

It happens in Safe mode as well as normal instances of Outlook.  It doesn't appear to cause any issues in the OWA though, so that's at least a small workaround I can provide my users.

Hi,

I checked your other thread in the Exchange forum. Since the issue doesn't occur on OWA, I do think it's on Outlook.

Please let the users try running Outlook as administrator, check if this issue will persist, this can be a permission problem.

If the problem persists, please collect the event logs after the crash:

Press Win + R, type "eventvwr" in the Run dialog, press Enter.

Expand Windows Logs -> Application, you should see some entries about the crash issue, collect the logs and send them to our email address:

ibsofc@microsoft.com

Please add the url of this thread in the email for easy tracking.

Regards,

Melon Chen
TechNet Community Su