Fix: “Not valid SMTP address” while adding migrated mailbox permissions

A customer recently came to me with an issue leaving them unable to add permissions for a migrated user to an on-prem calendar. Upon attempting to do this, they received the below error: A very confusing issue as the mailbox Exchange is looking for most certainly does exist. A quick check using the below command … Read more

Fix: Cryptographic exception error when assigning certificates on Exchange

During a certificate renewal on Exchange 2016, I received the below error while attempting to assign services to the new certificate: You’ll also see a similar message when generating new self-signed certificates via PowerShell: In my case, this was caused by McAfee Endpoint Security. Disabling Threat Prevention and Adaptive Threat Protection allowed me to complete … Read more

Fix: Seamless SSO not working for Staged Rollout users

If you’re planning on making the switch from federated to cloud authentication, you have probably heard of Staged Rollout; a new feature from Microsoft that allows you to pilot the migrated experience without migrating your entire domain. While the feature works as advertised, Microsoft’s setup instruction are missing a key step to get Seamless Single … Read more

Fix: ScriptingAgent error on Exchange 2016

I recently worked with a client to install a new Exchange 2016 server into an existing Exchange 2010 environment. The install was smooth and all tests were successful, however I faced a recurring warning whenever using the New-Mailbox cmdlet. This error was present in both EAC and EMS (full error can be found at the … Read more