I have an ADFS environment with 2 ADFS server and 2 WAP servers both load balanced via a Kemp Loadmaster. Everything works great except when I try to access O365 externally sometimes I get the forms based authentication and sometimes I get a Windows authentication popup. I would suspect this is due to load balancing and one of the servers is not configured correctly. Should I be looking at the WAP servers or the ADFS servers and where would I look to see this configuration to see if there are any deviances between servers.
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