Dec 19 2018 10:17 AM - edited Dec 19 2018 12:45 PM
Hi,
Last week we're suffering from many office 365 errors, that started to happen out of the blue.
Now, it's a new one, we're using EWS to access office 365 , using account with impersonation rights to access another mailboxes.
Since yesterday we see high rate of error "No mailbox with such guid" on the mailbox that are really exists and valid mailboxes.
Have no idea what is going on there in Office 365, but last week it's a worst ever, 3 different issue for one week, MS support team is totally non-professional and response with "it's a connectivity issue" or "it's a 3'rd party issue, we don't solve this", even, even when we send them request / response trace, clearly showing what was request and what is response, and where's the problem. And they constantly asking for the screenshot for EWS !!!
Very sad, it was stable product, but last weeks dangerous degradation, affecting many tenants, without any one from Microsoft is taking responsibility on that.
Dec 19 2018 02:14 PM
SolutionDec 19 2018 02:28 PM
Dec 19 2018 02:41 PM
Dec 19 2018 10:29 PM
Strange, while we tried to check the flag, with the customer, seems that mailboxes that failed with that error, found that lost their licenses. They were licensed and somethow license was vanished from them.
Dec 19 2018 02:14 PM
Solution