>> For the time being I'll disable session tickets (at least) for submission. >> The performance impact is negligible in my case. >> >> Thanks for having a look! > > You're welcome. If you have a Microsoft support contract, you should > ideally file a bug report and refer to: > > https://datatracker.ietf.org/doc/html/rfc5077#section-3.4 > > to note that the server behaviour (sending an empty session id when > issuing session tickets) is correct and expected. If Outlook is not > prepared to handle empty session ids, it should not enable session > tickets.
I don't have a support contract but I could cross-post it to the mailop.org mailinglist. Chances are Microsoft staff is reading it and can pass it along. > Are you on the latest version of "Office"? I think so - Microsoft Office Professional 2021 with Outlook Version 2209 (Build 15629.20208). > Perhaps what happened in the Windows update is that session tickets got > enabled by default, behind Outlook's back as it were. It is also > possible that a newer version of Outlook handles this correctly. > > One more PCAP file could shed light on this hypothesis. This would be > with tickets enabled on the server, and the client using "pre-update" > Windows. I'll see if I have any pre-update snapshots left. Best regards Gerald
