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ACS 4.2 "Internal error" when migrate to Windows 2012 DC

Dear All:

We want to migrate DC 2003 to DC 2012, it 's mixed mode now. At first, We were shutdown the DC 2003 and ACS 4.2 sometimes got error "Internal error" when user couldn't access network in VPN or Wireless but not all of users. Finally, We open the DC 2003 ASAP, user can login at once. the error doesn't appear again. it is so weired. We had validated it can work with ACS 4.2 separately in windows 2012 or 2003 DC not mixed in Lab before migration. it seems to depend on DC 2003, we don't know how to do next step. Have anyone share about solve the situation? Thanks a lot.

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Cisco Employee

Update the ACS version to

Update the ACS version to newer releases to work with win 2012. please check the link for the information:

http://www.cisco.com/c/en/us/td/docs/net_mgmt/cisco_secure_access_control_server_for_windows/4-2/installation/guide/windows/IGwn42/install.html#wp1041376

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