AD FFL and DFL 2003 to 2008 R2 and the KRBTGT account concern

I am doing the design, planning, prepping, etc. for a forest and domain level increase. I was reading the blog below and what caught my eye was this statement:

So when you raise the domain functional level to Windows Server 2008 or Windows Server 2008 R2 from Windows Server 2003 or gasp Windows 2000 the krbtgt password will be changed.

We do not have the original password documented for this, we have cisco, ibm, netapps, VMware, etc. that use AD Authentication. My question is this:

If the password is changed, then how do I ensure that the products that are not Microsoft continue to work and not go down?

http://blogs.technet.com/b/askpfeplat/archive/2012/04/09/a-few-things-you-should-know-about-raising-the-dfl-and-or-ffl-to-windows-server-2008-r2.aspx