Free Busy not working for all Domains in Environment
说明
Free Busy works for only the first 100 Domains.
原因
Microsoft's Availability Address Space has a limit of 100 Domains if that number is exceeded then the ones added above 100 will not work.
解决办法
Reduce the number of domains in the availability address space to 100 Domains. You may want to reach out to Microsoft directly to confirm the current limit on unique "Availability Address Spaces" allowed in Office 365.