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Gust Customizations

Posted on 2016-09-10
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I believe I know the answer to my question but want to confirm. Current we have a template we use for our VM deployment which is already sysprep but would like to start using Guest Customization.

1) In order for Gust Customization or work our base template should not be sysprepped since this is handles by the Gust Customization correct?

2) I need to upload the sysprep files for each OS version we use? Windows 2008, 2012, etc...

3) If we want some VM to be domain joined and other not we need different cusomizations correct?
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Question by:compdigit44
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by:Andrew Hancock (VMware vExpert / EE MVE)
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1. No not necessary because the option to Sysprep, is an option the Guest Customization. But as per Microsoft guidelines, all clones, should be sysprepped before production.

2. No, they are included on later OS, this was only needed on early OS.

3. Correct, you can define many OS Guest Customizations.
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by:compdigit44
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Hancock, thank you for you valuable feedback as always.  Just to confirm have my template already sysprepped is ok and I can select to "no" have the customization do this correct? the old OS I have is Windows 2008 not R2. Are these files already present??

Thanks Again!!!!
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by:Andrew Hancock (VMware vExpert / EE MVE)
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What you need to be careful of, is sysprepping too much!

what state is the current OS in ?

2008 they are built in.
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by:compdigit44
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If you are referring to the "rearming" issue I have already been it with that. I believe the max number of syspreps on a server OS is 3 but could be wrong. So basically there is nothing more I need to do except configure the customization correct. The file are ok for 2012 as well?
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by:Andrew Hancock (VMware vExpert / EE MVE)
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If you are referring to the "rearming" issue I have already been it with that. I believe the max number of syspreps on a server OS is 3 but could be wrong. So basically there is nothing more I need to do except configure the customization correct.

correct, 2012 files included in OS
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by:compdigit44
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In the guest customization under Workgroup / Domain selection you have to type a account with rights to add devices to the domain? Is it possible to prompt the user for credential instead?

If I do want to do this I will need to an a vNIC to my template which is very much bare bones
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by:Andrew Hancock (VMware vExpert / EE MVE)
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You should always have the VMXNET3 interface in your golden master template, which a network interface, you cannot do anything with a VM today!

In the guest customization under Workgroup / Domain selection you have to type a account with rights to add devices to the domain? Is it possible to prompt the user for credential instead?

I'm afraid not OS Guest Customization is no more, than VMware vSphere providing an unattended.xml to the unattended installation of an OS, so it will use the user credentials provided.
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by:compdigit44
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Thank you for the great feedback..Would this make it hard for audit tracking purposes... ;-)
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by:Andrew Hancock (VMware vExpert / EE MVE)
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Would this make it hard for audit tracking purposes... ;-)

can you expand on that ?
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by:compdigit44
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What I means is when you add a device to the domain you can see which user account the action was  performed under. If using a generic account you mask "who" really did the action
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Andrew Hancock (VMware vExpert / EE MVE) earned 500 total points
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Okay, yes I understand.

But you should also be able to track and audit from events and tasks who deployed the VM and Template, and hence who joined it to domain.
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by:compdigit44
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true..... I see both sides....

thanks Again :-)
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by:Andrew Hancock (VMware vExpert / EE MVE)
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no problems, as an aside we are seeing more organisation turn to MDT to deploy servers via PXE/MDT than using Guest Templates, because they have much better control in a task sequence for Change Control, Change Database, as to what is included in the server.

But again MDT does require development to get right, and start deploying correctly, and it an be used by the unskilled, to select exactly what they require for each server, e.g. IIS, File Server etc, updates are deployed at server baking and making....

Maybe worth a look, and see if it fits in with your organisation.
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