Tune Exchange Online (O365) Performance

To improve the speed of migration and reduce your organization’s bandwidth constraints for Exchange Online, consider the following:

  • Reduce mailbox sizes and always use cached mode
    • Smaller mailbox size improves migration speed. Cached Exchange Mode enables a better experience when you use an Exchange account. In this mode, a copy of your mailbox is saved on your computer. This copy provides quick access to your data, and it is frequently updated with the server that runs Microsoft Exchange.
  • Use the mailbox move capabilities with an Exchange hybrid deployment:
    • With an Exchange hybrid deployment, offline mail (in the form of .OST files) does not require re-download when migrating to Exchange Online. This significantly reduces your download bandwidth requirements. A hybrid deployment provides the seamless look and feel of a single Exchange organization between an on-premises Exchange organization and Exchange Online in Microsoft Office 365. In addition, a hybrid deployment can serve as an intermediate step to moving completely to an Exchange Online organization.
  • Schedule mailbox moves to occur during periods of low Internet traffic and low on-premises Exchange use:
    • When scheduling moves, migration requests are submitted to the mailbox replication proxy and may not take place immediately.

For support migrating to Office 365 or enhancing your current environment. Contact Us at www.SkyBridgePro.com 

 

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Exchange Hybrid Wizard Returns an MRS Proxy Server Error

After installing Exchange 2016 and properly configured the URLs, I proceeded to run the Hybrid Configuration Wizard via Office365 portal to find an MRS Proxy error.

MRS Proxy Error

To solve this problem, I took the following steps:

  1. Open the Exchange Management Shell.
  2. Run the following command
Get-WebServicesVirtualDirectory "ServerName\EWS (Default Web Site)" |FL Server,MRSProxyEnabled

If “MRSProxyEnabled :False” is returned in the output, this is the cause of the issue.

However, in my case the results where different. The command returned“MRSProxyEnabled :Enabled”. There is an issue on the hybrid server in which MRSProxy shows as Enabled when you run the Get-WebServicesVirtualDirectory cmdlet, but MRSProxy is actually disabled.

SOLUTION: To solve this issue, users will have to Disable the MRSProxy, restart the IIS services, and Re-Enable the MRSProxy

Set-WebServicesVirtualDirectory "<ServerName>\EWS (Default Web Site)" -MRSProxyEnabled $false
IISReset
Set-WebServicesVirtualDirectory "<ServerName>\EWS (Default Web Site)" -MRSProxyEnabled $true
IISReset