User can’t access on-prem mailbox after migration to Exchange Online
After migrating a user mailbox to Exchange Online (from Exchange 2016) the user could no longer access some shared mailboxes that are still hosted on-premise in Exchange 2016 (permissions are fine, they could access them prior to being migrated). When…
User can’t access mailbox after migration to Exchange Online
After migrating a user mailbox to Exchange Online (from Exchange 2016) the user could no longer access their mailbox in Outlook, it gave no error just behaved as if it was offline. I tried removing the profile and creating it…
Users have two mailboxes, one online and one on-premise
While working with an Exchange hybrid environment (Exchange 2016 on-premise and Exchange Online) it became apparent that some users had two mailboxes; one on-premise and one in Exchange Online. Their primary mailbox was in the on-premise environment, the one online…

Exchange Hybrid Wizard – The WinRM client received an HTTP status code of 502 from the remote WS-Management service
I’m running the Office 365 Hybrid Configuration Wizard (HCW) on an Exchange 2016 and receive the following message: Connecting to the remote server failed with the following error message: Connecting to remote server <servername> failed with the following error message:…
Exchange 2016 – “Application cannot be started” when running Hybrid wizard
While trying to run the Hybrid Wizard in Exchange 2016 I get a message box: Application cannot be started. Contact the application vendor. Clicking the Details button opens a log file, and this line half way down stands out to…

Exchange 2016 – Error 500 when running Hybrid wizard
While trying to run the Hybrid wizard in Exchange 2016 (the link at the bottom left of the Exchange Admin Centre) I get a HTTP 500 error after logging in with my Office 365 credentials: It may be just coincidence…