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No, there is no reason why it should. &nbsp;The online maintenance runs whilst the database is &quot;live&quot; so there may be a slight performance issue for the devices during this time but it's not likely to be noticed.
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No, there is no reason why it should.  The online maintenance runs whilst the database is "live" so there may be a slight performance issue for the devices during this time but it's not likely to be noticed.

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But it is recommended this is run during low or even no utilisation periods. &nbsp;
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But it is recommended this is run during low or even no utilisation periods.  

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The maintenance window is between 1am and 5am by default so this is a low utilisation period. &nbsp;This is when the online defrag runs.
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The maintenance window is between 1am and 5am by default so this is a low utilisation period.  This is when the online defrag runs.

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so the long and short is smartphone access should not effect an online defrag right even though mailboxes are being accessed.<br />
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One last thing. what happens if you run the maintainance window during normal office hours ?
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so the long and short is smartphone access should not effect an online defrag right even though mailboxes are being accessed.

One last thing. what happens if you run the maintainance window during normal office hours ?

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Does smartphone access effect Exchange online maintainance / defrag ?<br />
These devices are continualy accessing mailboxes, downloading mail, etc
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Does smartphone access effect Exchange online maintainance / defrag ?
These devices are continualy accessing mailboxes, downloading mail, etc

Does smartphone access effect Exchange online maintainance / defrag ?

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

The BlackBerry operating system is proprietary; releases beginning with BlackBerry 10 include support for applications written for the Android platform. As such, developers can use almost any programming language that can be used for other smartphones, including Java, Adobe Air, .NET and HTML5/JS (via an app packaging framework like PhoneGap) .

BlackBerry Programming

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.