Hello,

I will be migrating our email from hosted exchange to Exchange Online. The DNS records provided on our O365 Admin Portal are different from the values provided in the Microsoft "Create DNS records at Amazon Web Services (AWS) for Office 365" which is linked in the same section. The only difference in the records is the TTL values. I'm wondering which ones I should be using, the Admin Portal values or the linked article values (which is also in the Admin Portal).

EXAMPLE:

MX record TTL is 3600 in Admin Portal domain setup but 300 in the linked article.

Screenshot attached and link to article below.

https://docs.microsoft.com/en-us/office365/admin/dns/create-dns-records-at-aws?view=o365-worldwide#BKMK_add_MX

Advice would be greatly appreciated.

Thanks,

Tony