Email will not open

The error message you are encountering indicates that there are too many objects opened in your session, specifically related to the Microsoft.Exchange.Data.Storage.TooManyObjectsOpenedException. This typically occurs when the number of non-MAPI sessions exceeds the limit set by the Exchange server. In Exchange Server 2010, the default limit for service sessions per user is 16.

To resolve this issue, you may need to close some sessions or reduce the number of concurrent connections to your mailbox. Additionally, consider checking the server settings to ensure they are configured correctly for your usage patterns.

If the problem persists, it might be beneficial to consult with your IT administrator or support team for further assistance.

References:

• You cannot connect to an Exchange Server 2010 mailbox from Outlook Web App

Hi @Hanna E

Thank you for posting your question in the Q&A Forum. 

We understand how frustrating this can be, especially when you need quick access to your emails, and we apologize for the inconvenience. 

The message you’re seeing, Microsoft.Mapi.MapiExceptionSessionLimit means that your account currently has too many active connections (sessions) on the Exchange server. Since this is controlled on the server side, client-side fixes alone often cannot fully resolve it, but here are some helpful steps you can try: 

1. Sign Out and Take a Break 

• Please sign out of your email on all devices (including your desktop Outlook, any mobile apps, and browser tabs). 
• Wait quietly for about 30 minutes before trying to sign back in. This gives the server enough time to fully release all of your previous connection attempts. 
• After waiting, try accessing your mailbox via via Outlook on the Web (OWA) first: https://outlook.office365.com/mail/  

2. Quick Checks 

• Check for Updates: Make sure your Outlook app is running the latest version; updates can improve how it manages server connections. 
• Lighten the Load: If you have multiple Shared or Delegate Mailboxes loaded automatically, consider temporarily removing non-essential ones to reduce session usage. 

3. Contact Your IT Admin 

• If the issue continues, your IT support team can perform a Force Sign-out for your account via the Microsoft 365 Admin Center. This clears all active sessions and is usually the definitive solution. 
• For more technical details on session limits in Exchange, your IT team may find this Microsoft documentation helpful: Managed Store Limits in Exchange 2016 and Exchange 2019 | Microsoft Learn 

We hope one of these steps helps resolve the issue quickly. Please let us know how it goes, we’re happy to assist further if needed.

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