we have currently, forefront TMG 2010, exchange server 2010 and lync 2010, running on our network and every working fine but recently i upgraded client MS Office 2010 to MS Office 2013 and suddenly forefront TMG 2010 started denying lync 2013 and outlook 2013 access to the server.

Please can somebody tell me how to resolve this problem.

Hi

Thank you for your post here.

Do you mean that you have published exchange server 2010 and lync 2010 via TMG?

How dou you judge that TMG  blocks your traffic?

Please check if there is any error information via TMG live logging.

You can try to delete publish rule and reconfigure it.

Best Regards

Quan Gu

yes i know is TMG 'cos it prompts for authentication each time i try to sign in to the lync.

Hi,

Please provide TMG live logging information. it is helpful for us to locate the issue.

 

Best Regards

Quan Gu