![]() Migrate your Exchange 2010 servers to Exchange 2016 on your on-premises servers.Then remove on-premises Exchange servers and Active Directory. Migrate mailboxes using cutover, minimal hybrid, or full hybrid migration. It's a great time to explore your options and prepare a migration plan. But because of the changes listed above, we strongly recommend that you migrate from Exchange 2010 as soon as possible.įor more information about nearing the end of support, see Resources to help you upgrade from Office 2010 servers and clients. Your installation of Exchange 2010 will continue to run after this date. Security fixes for vulnerabilities that may make the server vulnerable to security breaches.Bug fixes for issues that may impact the stability and usability of the server.Technical support for problems that may occur.Because Exchange 2010 reached its end of support on October 13, 2020, Microsoft no longer provides: The end of this lifecycle is known as the product's end of support. This lifecycle typically lasts for 10 years from the product's initial release. Most Microsoft products have a support lifecycle during which they get new features, bug fixes, security fixes, and so on. If you haven't already begun your migration from Exchange 2010 to Microsoft 365, Office 365, or Exchange 2016, now's the time to start planning. I understand that this migration has already been done in 2015, but this is generally relevant to anyone who wanders to this page while planning similar migration.This article applies to both Microsoft 365 Enterprise and Office 365 Enterprise.Įxchange Server 2010 reached its end of support on October 13, 2020. Then you'd have a backup if something is missing. If there are any doubt that there might be some problem with direct migration (caused by contracts or configurations with the 3rd party email provider), I'd first take PST backups with Mailbox Export Requests before starting the direct migration. Just do not use it if you already have Exchange.) ( IMAP migration also exist, but it is way worse than using PST files as it needs passwords from all users in the source system and won't transfer anything else than Inbox (doesn’t migrate contacts, calendar items, tasks or emails bigger than 35 MB). ![]() RecipientOrganizationalUnitScope "/Client/Users" ` Example: New-ManagementRoleAssignment -Name:Office365Migration -Role:ApplicationImpersonation ` That should be fine with a (sane) 3rd party email provider. In migration cases where you can't use administrative account on the source system, it is possible to use Application Impersonation instead and limit it to specific OU so that you don't have more privileges than you actually need. if they have many companies on one AD and do not want to allow administrative access to them all for a migration of an individual client. There might be some kind of limitations with the 3rd party Exchange provider mentioned that have led to using PST files in the first place, e.g. staged migration (Exchange 2003/2007) for migrating users part at a time.cutover migration to move all mailboxes (less than 2000) at once.Office 365 has several tools to migrate mailbox contents directly from on-premises Exchange: However, intermediate PST files aren't necessary in most cases. The difference between OST and PST is well discussed here, and Massimo is closest to best practices with Mailbox Export Requests. ![]() The original question states that data is collected to PST files with Outlook on individual computers, which leads to believe that users should migrate their own data with import tool on Outlook. pst in order to migrate them to Office 365 via PST importing by network upload. (*) In Outlook 2013, OST files are used for IMAP4 too, which makes sense, since IMAP4 keeps the messages on the server and accesses them remotely, instead of downloading them like POP3.Īll the other answers sticks to the idea, that Exchange Server mailboxes needs to be exported into. There is, however, a better option for exporting Exchange mailboxes to PST files: you can do that on the Exchange server itself, using a Mailbox Export Request you can also do that in bulk, exporting several (or all) of your mailboxes. You could force Outlook to download all messages to a PST file by configuring it to connect to Exchange using POP3/SMTP instead of MAPI or Outlook anywhere, but this would make most Exchange features (like GAL, calendar sharing, shared mailboxes, public folders, and so on) unusable it's a highly not-recommended configuration. This local cache can also be disabled for Exchange mailboxes, as others have mentioned. Outlook uses OST files as a local cache of Exchange mailboxes when connected to an Exchange server using MAPI or Outlook Anywhere it instead uses PST files when connected to POP3/IMAP4 accounts (*).
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