Any clues in the Package Manager logs you can find? These can be found here: C:\ProgramData\Avecto\IC3 Adapter\Logs

 

If you open up Services.msc and restart the Package Manager service, it’ll perform the initial scan for updates within 3 minutes (so you don’t have to wait for the 2 hour window) -- I’d recommend watching the logs to see what they’re showing when that check-in to PMC takes place.

 

Testing Pkg Mgr update connections (ref: Add URLs to allowlist (beyondtrust.com)):

Test-NetConnection prdpkgsinstallercdn.azureedge.net -Port 443

Test-NetConnection prd2pkgsinstallercdn.azureedge.net -Port 443

 

Testing connection to PMC tenant:

Test-NetConnection <TENANT>.pm.beyondtrustcloud.com -Port 443

Test-NetConnection <TENANT>-services.pm.beyondtrustcloud.com -Port 443

Connectivity to Package Manager updates and PMC tenant is working fine. I found the below error on the IC3adapter logs

 

>PMC.PackageManager.InstallationManager.CloudClient] 13] Unable to get latest packages: InternalServerError, "The delegate executed asynchronously through TimeoutPolicy did not complete within the timeout."

 ÂERR] ]PMC.PackageManager.InstallationManager.CloudClient] ]15] Unexpected Error occurred
Polly.Timeout.TimeoutRejectedException: The delegate executed asynchronously through TimeoutPolicy did not complete within the timeout.
 ---> System.Threading.Tasks.TaskCanceledException: The operation was canceled.
 ---> System.IO.IOException: Unable to read data from the transport connection: The I/O operation has been aborted because of either a thread exit or an application request..
 ---> System.Net.Sockets.SocketException (995): The I/O operation has been aborted because of either a thread exit or an application request.

 

As Niel shared above, but also consider the Endpoint security clients on your computers.

Endpoint AV, DLP etc. https://beyondtrustcorp.service-now.com/csm?id=kb_article_view&sysparm_article=KB0017099

At this stage, if you’re still running into issues getting this to work, I’d recommend opening a ticket with our support team to assist in getting this resolved.  Thanks for posting this topic!