vSphere 5.1 Cluster

Hi all,
just inherited a small vSphere cluster of 3 hosts and the vSphere server running 5.1.

I have 2 problems the first being that I cannot log onto the vSphere server because the credentials are unknown -  I'm not logging this call for that as I suppose that is something that we here need to deal with and try to acquire the credential but my question is this.
I can log on to all 3 ESXi servers using the client. Server 1 has 12 guests, server 2 has 9 guests but server 3 is showing no guests running on the server at all. So, I know that it is being managed by vSphere because if I select the manage server tab it warns me that it is being managed by another (vSphere) server. So from accessing the server in this manner where do I start to look for problems as from what I can see everything looks normal. Obviously I can't vmotion the guests across but how do I tell that it doesn't have a problem that is preventing it from participating in the cluster?
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Jason ThomasAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You need to login to vCenter Server, and have a look.

(is this connected to Active Directory!???)

also are there any events, alarms in Tasks and events ?
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Jason ThomasAuthor Commented:
Hi Andrew,

Yep trying to accessing vSphere. Ok, I have some more info. The stack is running vSphere essentials and so I believe HA isn't supported on this version.
I have noted that the vSphere service will start but then stop after a few seconds, no idea why.
There are no events other than those we have created by logging onto the box.

I know that it is using single sign on but I can't think of any way of telling which domain accounts it is linked to.
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Jason ThomasAuthor Commented:
Andrew, I have acquired the SSO credential and when I try to logon via the web client it tells me "Associated users password is expired".

Wow! I can't see it or any account on the server that looks anything like an account used for vSphere. Starting to think not much option but to blow away vSphere. What's your thought?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
vCenter not starting....

database full ?

4GB or 10GB DB size? version of SQL Express ?
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Jason ThomasAuthor Commented:
Hi, using SQL 2008R2 so limit is 10gb then? I'll check that now.

We have identified that the SSO account had expired. I have run a SQL query to increase the expire timeout. After a restart we can now log onto vSphere using the SSO account and launch the console but we are unable to see vSphere or any hosts. Further investigation shows the vSphere service has stopped. If I restart the service it will run for 30 seconds and then stop. We are planning to reboot the server. Would the database being full manifest this type of error do you think?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
SQL Express 2008 R2 database limit from increased from 4GB to 10GB correct.

Often a failure is the database is too large.

Check the db ?
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Jason ThomasAuthor Commented:
ok, checking now...
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