Skykick automates the migration of email from other platforms onto Office 365, though occasionally it needs a bit of help.
This is especially true when moving from Google Apps or Google for Work to Office 365. These mailboxes can bloat in size due to how both systems manage email folders.
Office 365 (Microsoft Exchange) stores email in folders, while Google gives email labels. The difference is, in Exchange an email can be in only one folder, while in Google an email can have multiple labels. When migrating from Google for Work to Office 365, SkyKick will create Exchange folders for every Google label, and migrate emails that are assigned multiple labels into multiple folders.
This results in a bunch of duplication on the destination system.
When you’re using Skykick to migrate large mailboxes from Google for Work, you may occasionally receive a message advising that the mailbox may exceed the storage limits on Office 365. While this message appears, synchronisation will be paused.
In order to resume the migration for this mailbox you’ll need to do the following:
Confirm you’re using the right retention policy
Enable archiving on the mailbox.
Ensure the archive is running.
Mark the alert as completed.
What are Exchange Retention Policies?
In Exchange, each mailbox is assigned a Retention Policy that contain the retention settings for mail within the mailbox. Retention policies are made up of Retention Policy Tags.
Retention Policy Tags outline how long Exchange is going to keep a user’s mail before performing a specific action on it. For Retention Policy Tags, this action can be PermanentlyDelete, DeleteAndAllowRecovery or MoveToArchive.
When archiving is enabled on a mailbox, the default policy is to archive anything older than two years. This may be enough to get the migration running again, but just in case it’s not, you can create a new Retention Policy Tag with a shorter archive time limit, apply it to a new Retention Policy, then apply the policy to the user you want to archive mail for.
Alternatively, you can edit the default policy (known as Default MRM Policy) or its tags, though this will affect all users that have archiving enabled.
You can create a new Retention Policy and Retention Policy Tags via PowerShell or via the Exchange Control Panel. In Exchange Control Panel, these actions are performed under Compliance Management. In this tutorial we’ll be working in PowerShell.
Setting up a Retention Policy in PowerShell
This new Retention Policy will move any mail older than 1 year into a users archive. It will have one tag.
Connect to Exchange Online via PowerShell as an Exchange Online Administrator
Run the following PowerShell cmdlet
New-RetentionPolicyTag "1 year move to archive" -Type All -RetentionEnabled $true -AgeLimitForRetention 365 -RetentionAction MoveToArchive
Create the new Retention Policy and link the tags
New-RetentionPolicy "One Tag Policy" -RetentionPolicyTagLinks "1 year move to archive"
Assign a retention policy to a user
Set-Mailbox -Identity UserAliasOrEmail -RetentionPolicy "One Tag Policy"
Confirm the Retention Policy was applied correctly by running:
Get-Mailbox -Identity UserAliasOrEmail | ft Name,RetentionPolicy
Enable Archiving on a mailbox.
Once you’ve assigned the policy, you can enable archiving on the user’s mailbox. This can be done in the Exchange Control Panel under Recipients, Mailboxes on the right menu.
In Powershell, you can run the following cmdlet while connected to Exchange Online.
//gcits.com.au/wp-content/uploads/GCITSlogowordpress.png00Elliot Munro//gcits.com.au/wp-content/uploads/GCITSlogowordpress.pngElliot Munro2016-08-25 20:36:252016-08-25 21:48:41Working with archive policies in Office 365 and SkyKick