Citrix schedule reboot

Hi I have a tough on here I think??

I have 32 citrix 4.5 servers that have one desktop published to users globally from Sydney to California and they all share the same 32 citrix servers.

The problem is there is no time day or night when the servers can be revolted without kicking users off and yes if you send a message prior to the reboot they ignore it. So i'm running out of ideas.

Any smart ideas please??
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pridc28Author Commented:
Posted via iPhone - apologies with the spelling
This isn't as tough as it sounds.  You have two tasks: first, make certain servers unavailable for load balancing during specific hours (for their maintenance window); second, schedule a reboot for just those servers during that window.  

1) Create a load evaluator in the Presentation Server Console, add a rule for "Scheduling" (this will be your 'maintenance window 1' rule), in the scheduling "Times of Day:" options, enter the times of day and days of week that group of servers should be available.  This will let you take groups of your 32 servers and transparently make them unavailable to the load balancing mechanism during times you specify so you can perform scheduled reboots.  

2) If you have the enterprise or platinum versions of Citrix, you can create a reboot schedule in Resource Manager.  Otherwise, you can use Scheduled Tasks in Windows to issue the shutdown /r /t xx /f command (/r is reboot, /t specifies time in seconds for the warning interval, 0 for immediately), and /f may be necessary if somehow users are on the server.  

You can create multiple evaluators to make each small group of servers unavailable during each desired maintenance window.  

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Another option is to minimize the number of connections on the servers without having to make them unavaible for an entire day.  You can add a task on each server to disable logons at a given time.  If you reboot five servers on a Monday, add a scheduled task to disable logons at 2pm, or whatever time you work out.

AT \\<servername> 14:00 /every:M "c:\<Path>\disablelogon.cmd"

Add change logon /disable to disablelogon.cmd
With the load evaluators you can schedule the outages within 30 minute increments.  
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