Retrieve add-in logs from Outlook Web Access (OWA)

Launch Browser, open Dev Tools via “right-click -> Inspect” (Make sure Dev tools are opened before navigating to outlook url)

Open URL https://outlook.office.com/mail/inbox?enableTracing&track=*

Navigate to Network Tab

Repro your scenario in Outlook Web

Go to "Help" -> "Get Diagnostics", and run "Send Diagnostics". Share the six digit alphanumeric code generated with us (this can be shared publicly).

Export har file from Devtools: 

Navigate to console tab. Copy all the details into console log, and save to a text file :

Share the six digit alphanumeric key and send the har file, and console log along with other details.