I checked in with Marriott today and found that I am about 100,000 points short of hitting the LT platinum level. I have tons of AMEX membership rewards points and asked if I could transfer over the needed amount to hit the 2,000,000 that I need. They said that would work fine. I have more than enought nights to qualify. Is there any danger in going this route?

(I won't hit platinum this year so I wanted to shore up my lifetime status.)
Thanks
IAN