Forum Discussion
Limits for maximum addresses in the IPListBlocked when using set-organizationconfig in EXO
Looking for a maximum number of entries in the IPListBlocked value when using the Set-OrganizationConfig -IPListBlocked parameter in Exchange Online I have about 5000 IP CIDR's that I intend to bloc...
This article is probably helpful:
https://blogs.technet.microsoft.com/askds/2015/10/29/administrative-limit-for-this-request-was-exceeded-error-from-active-directory/
Attempted to do this today using a public blacklist as the source material (~5k entries) and found that i could only get the first 1176 entries into IPListBlocked in EXO.
ymmv depending on the size of the Ips you want to add.