The University of Texas at Austin

Office 365

REQUIRED: Thunderbird - Pre-Migration Checklist

This document walks users of Thunderbird through the checks required before a mailbox can be migrated from AEMS to Office 365. The following steps must be reviewed thoroughly:

Removing Large Items Before Email Migration

  1. From Thunderbird's Edit menu, select Find, then Search Messages. A Search Messages dialog box will open.

  2. Change Search for messages in to your account (this will be the choice in the list just above your Inbox).

  3. Change the first criterion drop-down list to Size (KB).

  4. Change the second criterion drop-down list to is greater than.

  5. In the field next to is greater than, enter 20000.

  6. Click Search.

  7. (optional) Click the columns icon at the right end of the header row for your search results, then click Size. This will add a Size column to your results.

The search results will populate at the bottom of the window. From here you can open, manage and delete messages and their attachments. Messages that you delete will remain in the search area, but will have Deleted Items listed as its folder.

Deleted Items Warning

Large Deleted Items Folders
Deleted Items folders that are large in size can slow down your migration process. We will migrate your Deleted Items folder, but if these are messages you do not need, emptying the Deleted Items folder will speed up your migration process.

30-day Deleted Items Timer and Functionality
Once your mailbox has finished the migration process, a 30-day timer will start, and all messages migrated will be permanently deleted in 30 days. Moving forward, all messages in the Deleted Items folder older than 30 days will be permanently removed.

If there are any messages in that folder that you may need, please restore them to your mailbox before this timer is up.

Purge Recover Deleted Items Folder

If you identified any large items using the above steps, permanently removing them from the Recover Deleted Items folder is needed to prevent any migration issues. This feature is not available in Outlook 2011 but can be done using the Outlook Web App by following the instructions available here:

Outlook Web App - Pre-Migration Checklist (Purge Recover Deleted Items Folder)

Public Folder Information

Please let your Technical Support Contact (TSC) know of any Public Folders you currently manage.

Resource Calendars and Accounts

We would like to migrate any rooms or resource accounts you manage alongside your mailbox so your workflow is not interrupted. Please let your Technical Support Contact (TSC) of any resources you manage.

Additional Resources for Migration Process

You will have received notice of when your migration date is. On that day or anytime before, please make note of the following resources for when your migration process is occurring.

Set up Office 365 email using Mozilla Thunderbird 8.0 This page will detail the expected behavior of Outlook 2007 during the process and any steps needed to take after the migration is complete.

Office 365 Help & Support
This is the main page for support on the Office 365 project. Here you can find a list of Known Issues as well as configuration directions for mobile devices.

Last updated February 10, 2014 @ 4:45 pm

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