We created a ticket with Microsoft Support. Every few days I had to ask for updates. Every time I did they told me that the problem was my PC (even though everyone with the problem has it on every pc they use) and each time they had me generate support files for them again. At some point my test system stopped having the problem, and they told me that they could no longer help unless I bothered one of my users every few days to get support files (the support files that I had provided many times) and when I told them I didn't want to do that they insisted there was nothing they could do. We got our Account Rep involved and they got more active, but still never found a solution. They just kept insisting that the problem was on the PCs, and not related to Teams.
Later I talked to a Microsoft Partner, who I won't name, and he explained that the way the Support system is structured, it benifits the first level support provider (who isn't Microsoft) to keep the tickets open as long as possible because they are paid based on the time they spend on each incident.
All that to say, Microsoft Support is only useful for burning your own time. I certainly wouldn't expect to get any help from them.
Edit: I forgot to mention that even having A5/E5 licensing, that costs hundres of thousdands, doesn't get you "premium support." Microsoft will sell you that seperately. This is just my opinion, but that model seems to encourage the not-premium support to be less than helpful. If it was useful people probably wouldn't pay for "premium," right?
If I sound salty, yeah.
