Single Sign-On over MRA is released with X8.5.1; this feature was previewed in X8.5. The Features in
X8.5.n section has been updated with information about SSO over MRA.

The VCS Control now defaults to SHA-256 for signing SSO requests it gives to clients, and you can change
it to use SHA-1 if required. In version X8.5, when the SSO feature was previewed, the VCS Control defaulted
to SHA-1 and there was no way to select a different algorithm.

Note: If you were using the SSO feature with X8.5, this change may cause it to stop working after upgrade to
X8.5.1. You have two options to resolve this: leave the new default on the VCS Control, and you may need to
reconfigure the IdP to expect requests to be signed with SHA-256 (recommended for better security); the
other option is to revert the VCS Control's signing algorithm to SHA-1 for your IdP (go to

Configuration

> Unified Communications > Identity Providers (IdP)

, locate your IdP row, then in

Actions

column click

Configure Digest).