I went on the Microsoft Exchange Admin Center and used the Message Trace to see the email was successfully delivered to the recipient, employee #1. However, employee #2 who was cc'ed did not receive the email and it doesn't show any activity for them in the Message Trace for this specific email either. Strangely, the same email structure with employee #1 directly receiving and employee #2 cc'ed had each of them receiving the emails all day today up until this point.
I did not make any modifications to the email admin settings during this time, nor did either employee modify their email settings either. Could someone point me in the right direction as to what might have caused this?
I have checked for the email on employee #2's outlook desktop client and web client.
Both employees are using Outlook 365 with Microsoft Exchange.