JoinDomain VMExtensionProvisioningError when deploying WVD (aka Conflict Error)

Deploying WVD Fails with a conflict error and when clicking for more information it presents a conflict and not much else that is useful by way of toubleshooting. Hopefully this helps someone else as it had me head scratching for a little while.. When creating the Host Pool, make sure that you haven't made the fatal error of using the Azure Active Directory Credential INSTEAD of the Local AD Domain Credential.  i.e do not use to domain join, even if it links back to the domain - this is where the conflict arrises.    Instead, use your full internal domain UPN.  Re-deploy your same configuration and you should find it goes through now without any problems. Additional findings.... Albeit my mistake above was an easy one, it does appear the error is directly linked to the domain join process. If you go into your resource groups, locate the session host and MSTSC directly to it.  Try the domain join pr

440 - Login Timeout (Outlook Web Access)

I have seen this error often the resolutions tend to be quite simple though either:

1) The IUSER anonymous account password is corrupt or has been reset.

To Fix:
Go to Active Directory, All Users, Right click IUSER_*SERVERNAME*
and reset password.

The go to IIS Manager, Right click the default web site, go to properties,
select Directory Security Tab, then click "Access and Authentication".

Replace the password with the new password you reset the account to then apply to all subcontainers when requested.

Restart IIS and this should resolve the issue.


2) The IUSER doesnt have permissions to view the Authentication module in OWA

To Fix
Start IIS Manager.

Expand Server_Name, expand Web Sites, expand Default Web Site, and then expand Exchweb.

Right-click bin, and then click Properties. On the Virtual Directory tab, verify that the Read check box is checked.

Expand bin.

Right-click auth, and then click Properties. On the Directory tab, verify that the Read check box is checked.


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