Microsoft Drops Law Firm That Made a Deal with Trump from a Case

If I'm a company and I hire a firm / some lawyers who have some sort of outstanding (potentially unconstitutional) deal with those in power to do something amorphous like:

>Simpson Thacher reached a deal with the White House last month in which the firm committed to perform $125 million in free legal work for causes acceptable to the Trump administration.

How can I even know that the folks I hired aren't potentially directly / indirectly working against my interests? or just a phone call / threats away from doing that?

They already crumpled under the pressure from an administration with no respect for the law ...

I don't know that this IS Microsoft's point of view, but it seems to be a rational one.