Which microsoft certification would be the most useful for me when I am primarily not a Microsoft guy?

So, my employer suggested that it would be good for me, professionally, to get my certifications up to speed, and told me to pick a few that I found the most relevant at their expense. As I mainly deal with networks and Linux servers, and have done so for decades at this point, this was easy enough: renewing my CCNA that I took some 20 years ago, as well as getting my CCNP. The latter of which is closely related to what I already do.

However, my employer decided that I must pursue at least one Microsoft certification, and I honestly don't know where to start, as the only microsoft software I use is Outlook.

I've been thinking of my status as the walking embodiment of the "old man yells at cloud"-meme, and thinking it's probably time to turn into "old man embraces cloud". I know that a lot of our infrastructure runs in azure (something with which I have no experience. I did use some Oracle cloud VMs at one point, that's it.), and I know there was a huge ordeal last year that involved doing a lot of dataprocessing on temporary azure architecture, and I figure I should probably get in on that at some point.

Is perhaps something Azure related my best bet?

UPDATE: I was going to go for some azure stuff, but I resigned instead. Let's see if my new employer is willing to pick up the tab instead.