We have an external party that has been using REST API access for a few months. Their access stopped working (Unauthorized - Invalid login attempt) around the same time that the Netsuite message about needing to sign the Beta message. I think that part is a co-incidence. But now when I generate new app & token credentials for them, they still fail. They are not using beta features. Has anything else changed recently?

only other thing that is changing is Deprecation of HMAC-SHA1 for Token-based Authentication (TBA) on 2021.1

@battk thanks for this. Weird thing is no longer appearing in Login Audit Trail. SA 42311 seems to also have more clues

if you are on 2021.1, i would start investigating hmac-sha1 deprecation, though that should at least hit the login audit trail

any idea what's considered an existing solution? existing integration record? or existing integration tokens?

I’m late to the party on this one. The integration credentials were created last year and working up until recent. I created a clean integration and tokens. Setup in Postman as I have done in the past for other accounts. I also get the invalid login. I’ll have fresh look later