Optimize-MailboxesPerDatabase

Description

PowerShell script that evenly distributes the number of Exchange mailboxes per database

Getting Started

Download the Optimize-MailboxesPerDatabase.ps1 file

Basic Examples

Redistribute mailboxes

  .\Optimize-MailboxesPerDatabase.ps1 -Databases 'USDAG-003', 'USDAG-062', 'USDAG-262'  

Redistribute mailboxes, move the smallest mailboxes

  .\Optimize-MailboxesPerDatabase.ps1 -Databases 'USDAG-003', 'USDAG-062', 'USDAG-262' -BySize Smallest  

Redistribute mailboxes, move the largest mailboxes

  .\Optimize-MailboxesPerDatabase.ps1 -Databases 'USDAG-003', 'USDAG-062', 'USDAG-262' -BySize Largest  

Redistribute mailboxes for all Databases

$Databases = Get-MailboxDatabase  
.\Optimize-MailboxesPerDatabase.ps1 -Databases $Databases.Name  

Script Processing Time

Environment Tested on: Exchange 2016 CU5
Total Databases: 265
Total Mailboxes: 7175

Creating New Move Requests during actuall run time will vary depending on your environment. Using the WhatIf parameter I measure the command run time with the below results.

Average RunTime: 60 Seconds

Filtering for Largest mailboxes: 9 minutes

Filtering for smallest mailboxes: 4 minutes

If the script processing time is to long you may want to look into incorporating Invoke-Parallel in to the script. https://github.com/RamblingCookieMonster/Invoke-Parallel

Contributing

1. Fork it!
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -am 'Add some feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request :D

License

This project is licensed under the MIT License - see the LICENSE.md file for details