If you are having fallowing probes with your TMG , Active sync publishing please have a look your firewall settings to possibly remedy the issue.
Denied Connection NPWINTMG1 8/29/2011 11:56:54 PM
Request: OPTIONS http://webmail.SMTp25.org/Microsoft-Server-ActiveSync?Cmd=OPTIONS&User=dedealoc&DeviceId=androidc1734872834&DeviceType=Android
Open TMG, Drill down to FireWall Policy, locate the Active Sync rule you have and double click on it.
- Authentication delegation
- No delegation, but client may authenticate directly
- Click on Users and set , this rule applies to request from fallowing user set
- All users
Go to monitoring and make sure TMG servers ( if they are in Array) have been syncy, and test the rule.
On the logs & Reports create filter to capture the authentication attempts etc.
Hopefully you will see everything green in the live logins and issues will get resolved (-: