Originally Posted by
sdsearch
Which platform migration?
There was the website platform migration on Aug 18, but then there was the brand-specific hotel-side reservation platform that migrated at the end of October for Sheratons but I don't know when offhand for other SPG brands.
My Sheraton reservation numbers stayed the same (or at least the last 4 digits did) from my pre-Aug 18 bookings to my post-Aug 18 stays, at least for those stays before the end of October.
SPG brands are being brought to Marriott’s booking platform. Nov 26 that was the case with Ws and Westins. Next week StRegis and LCs. When this happens all pending reservations get assigned a new 8-digit number in the new platform, however they should remain visible from one’s account. As properties migrate this also allows for bookings with free night certs and combination of cash and points which the SPG platform doesn’t support.