Remote Desktop Services ActiveX error

School get the following error when they try and run Hosted Connector to access SIMS.

The issue is caused by the version of the MSTSC application not being compatible with the latest updates which includes a new version of mstscax.dll

To resolve the issue you will need to replace the existing MSTSC with the latest version.

Unzip and replace the mstsc.exe located in C:\Windows\SysWOW64\ with this file –  mstsc64

Unzip and replace the C:\Windows\System32\ with this file – mstsc32




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