![Step 10 of 17](http://www.adventuresinexchange.co.uk/wp-content/uploads/2019/11/CU14_Error-150x150.png)
Exchange 2016 – error 5506 when installing cumulative update
While installing Cumulative Update 14 (CU14) on one of my Exchange 2016 servers it failed at step 10 (Mailbox role: Transport service) with the following error: An unexpected error occurred while modifying the forms authentication settings for path /LM/W3SVC/1. The…