LTD cut off; appeal denied; Employment Status changed - what now?

Is that an IME paid by the insurance company and was that why they cut off your benefits?
A disability lawyer is the answer to the insurer cutting off benefits.

In Ontario (don’t know about Alberta), an employer can get rid of an employee if they believe the employment is “frustrated”.
No one can force you to retire but that may be your best option.
I’m not sure why my friend retired at 55 (I wish he’d asked my opinion first).
Sunlife was reliable so he had no reason to although I think his retirement income is higher than his disability income was (he worked for the feds).

If Manulife reinstates your benefits and the employer terminates you and pays severance then Manulife might be entitled to the severance money.

I would go with what your lawyer says.
I assume he has a copy of the master insurance policy?

If the employer terminates you, you will likely lose the group plan/benefits.
Read this thread Employment terminated? - #13 by Elaine