American Airlines recently announced that they would remove some fares from the GDS and make them available exclusively through NDC APIs. I'll spare you the technical details and skip to the operational impact - if you book through a corporate booking tool (like Concur) and have one of the major corporate travel agencies (BCD, AmEx, CWT), then about 40% of their available fares may be unbookable for you starting next month. The AA fares that you do see would be higher, which may trigger rule violations that guilt you or force you to fly another airline.

This follows other recent activity at AA to lay off a reasonable portion of their corporate sales team. One might say that AA is exiting corporate travel.

https://skift.com/2023/03/01/american-airlines-is-shaking-up-corporate-travel-booking-heres-why/