Shared Mailbox email delay in webmail

Question

I've got a question when comparing receiving email speeds for the web client for Outlook vs. the local thick client version. for an individual account, the receiving time is nearly identical, but for a shared mailbox , there's more of a delay on the web version than the local thick client one.

Any ideas why

Answer 1

Hello Hussain Rahim,

Good morning!

Thank you for publishing in Microsoft Community. We are happy to help you.

Based on the description you have shared; we understand that you are comparing receiving email speeds for the web vs outlook desktop.

Typically, the web client (OWA) relies on the server-side processing which may introduce additional latency due to network communication and the server load. However, to better understand the problem, have the same information as you and provide a solution, we need more details from you, please provide us with the following information. Thank you.1-Please Make sure you have the same time zone in your outlook desktop and in your outlook on the web (when you are using the shared mailbox check the time zone on web) 2-Please can you shared with us your finding details as screenshot or picture with us. It will help us to understand how you made a comparison between the shared mailbox receiving time email on web and desktop.

3-Please collect the original message header from the outlook on the web of one affected email and run the message analyzer and shared the details with us in private message, it will help to understand give you an clear answer Below are the steps to open private message:To View private messages option > click on Profile Picture at top of the right side > Select My Profile option.We look forward to your response. This requested information will help us to narrow down the scenario and find the right troubleshooting. We will keep assist you based on the information you will provide. I sincerely appreciate your patience and cooperation.Sincerely,Eben Ezer Tres | Microsoft Community Moderator