Microsoft Office Tutorials and References
In Depth Information
Exchange Online service availability and redundancy
Figure 10-5 Recoverable Items folder
After an item is removed from the Recoverable Items folder, there is a 14-day window for
an administrator to recover the item through the single-item recovery feature we
mentioned earlier. The 14-day clock starts from the moment the item is removed from the
Recoverable Items folder by the user or by a retention policy, and is separate and beyond
the 14-day period that an item resides in the Recoverable Items folder.
When you delete a user account in Active Directory (AD), remove the Exchange Online
license from a user account, or delete the mailbox, the mailbox and its contents will be
deleted. In the first scenario, the user account and the mailbox will be deleted during the
next scheduled directory synchronization. In the second scenario, where the Exchange
Online license has been removed, it will take some time before the actual mailbox and its
contents are removed. Only the final scenario is more immediate. When you delete the
mailbox directly through Windows PowerShell or through the administration portal, the
action takes effect immediately.
If the mailbox and its contents are deleted by any of these three actions, you can submit a
request within 30 days to Microsoft Online Services to restore the mailbox and its contents.
Exchange Online service availability and redundancy
Microsoft guarantees a 99.9 percent service availability that is calculated on a monthly basis
and on a per-customer basis. The 99.9 percent also includes maintenance windows, which
means there are no expected outages to Exchange Online due to planned maintenance.
Microsoft is able to accomplish this because of the geo-redundant infrastructure of
Exchange Online. If the Service Level Agreement (SLA) is not met, Microsoft will be
financially obligated to give you a reduction in your Exchange Online subscription costs for that
month. The financial liability and public perception are very significant factors that
motivate Microsoft to minimize slippages in meeting the SLA.
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