Configured SiteMinder SSO per tech note specifications. IDP flow works, but SP flow gives a 500 error and fails to redirect.
500
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The SiteMinder metadata contains malformed timestamps in the 'validUntil' attribute.
Manually edit the timestamps to follow the following format:
"%Y-%m-%dT%H:%M:%SZ"
ie: 2021-05-01T04:02:41.274Z
In some cases, SiteMinder returns a 400 error after this solution. See CASB CloudSoc SiteMinder SSO getting 400 error or navigate to step 8. in Configuring a SiteMinder partnership and change AuthBinding to HTTP-Post