I am recieving the following error trying to connect to OpenText
"Failed to connect to the external system [key=opentext]. The site-wide credentials may be incorrect. Please ask an administrator to update the credentials in the Third-Party Credentials page in the Administration Console. Connection failure details: Unexpected document! Received: HTML document"
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OK. Did you try to do as described in the error message?
Yes I am sure of the credentials in the Third-Party Credentials page
Did this work before? I do not have any recent experience connecting Appian via CMIS, but this looks like wrong credentials. Maybe the problem is not the credentials, but missing permissions on the server side.
First time testing this