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Exchange 2013 and Windows XP with wildcard certs

We had a client that upgraded from Exchange 2007 to 2013.  After the migration the Windows XP machines would not connect to Exchange.  The users were presented with a credentials / password pop-up repeatedly and no matter what was entered the Outlook client would...

Exchange Recipient Filtering not working

Problem: Recipient filtering is configured via the Exchange Management Console by opening Recipient Filtering and checking “Block messages sent to recipients that do not exist in the directory”, however all addresses are accepted with a “250 2.1.5...

Backups failing with Event ID 904

IT Support One of our clients was having an issue with backing up Exchange 2007 using Ahsay Online Backup Manager.  The backups were failing nightly and Ahsay was returning the error CExBackup::backupService:HrESEBackupSetup: Error Number 0xc7fe1f45: Instance not...