Hi there,
I have more than 10 years hands on working experience in IT industry especially with Microsoft Technology e.g. Exchange, IIS, Office 365, Azure, Windows Server, Active Directory, and SQL, etc.
I can start to look into this issue as soon as you want and confidently fix it within the timeline. Please message me to discuss in details.
My rate might not be cheap, but you pay what you get.
Regards,
Tom