Troubleshooting

Exchange Online Protection 550 5.4.1 Recipient address rejected: Access Denied. AS(201806281)

Today, I found myself working with a customer that was experiencing delivery failures to some Office 365 recipients from all external senders.

As problems go, this one definitely finds itself in the “interesting” category.  No, it’s never good to have “interesting” problems (just ask a doctor).… [ Continue reading ]

Configuration

Cloud UPNs for AAD Connect users with Alt-ID don’t update after domain verified in tenant

A few weeks ago, I ran into an issue with a customer.  Scenario:

  • Customer had configured alternate-id sign in with AAD Connect (the gist is that it flows on-premises mail to cloud UPN)
  • Synced identity to tenant
  • Tenant did not have any verified domains

As expected, without a matching verified domain in the tenant, UPN suffixes in the tenant were actually set as @tenant.onmicrosoft.com. [ Continue reading ]

Client

Dynamics 365 Network Test Tool

Yesterday, I was asked if I had developed any testing tools for the Dynamics CRM suite availability—but, never having had to do much with them, I didn’t have anything available.  I just built a quick tool today, and it covers all of the endpoints listed at https://support.microsoft.com/en-us/help/2655102/internet-accessible-urls-required-for-connectivity-to-microsoft-dynami[ Continue reading ]

Configuration

Update to the AAD Connect Network and Name Resolution Test Tool

A few months ago, I debuted a new tool for AAD Connect deployment (read about it here: AAD Connect Network and Name Resolution Test or download it here: https://gallery.technet.microsoft.com/Azure-AD-Connect-Network-150c20a3) which allows you to test a number of conditions to make sure your server and environment are suitable for deploying AAD Connect.… [ Continue reading ]

Client

Clearing Skype Cached data

Last year, I had a project that involved migrating a large customer from Office 365 Dedicated to Office 365 GCC (multi-tenant).  While Exchange hybrid moves were possible for the mailboxes, we were unable to perform the necessary hybrid migration configuration for Lync to migrate users. … [ Continue reading ]