Time Machine On/Off Button grayed out

Thanks BD. It is not locked and I can open it with Plist editor, but I so not know what I should be looking for.

I believe I am Admin Account. Rights and privileges set to read and write. Here's what the plist reads like excluding some extraneous stuff:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

<key>AutoBackup</key>

<true/>

<key>BackupAlias</key>

<data>

AAAAAAEmAAIAAQlCYWNrdXAgVE0AAAAAAAAAAAAAAAAAAAAAAADRYAvESCsAAAAAAAEJ

QmFja3VwIFRNAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

AAAAAAAAAAAAAAAAAAAAAtFgC8QAAAAAAAAAAP////8AAAkAAAAAAAAAAAAAAAAAAAAA

CUJhY2t1cCBUTQAAEAAIAADRYEQEAAAAEQAIAADRYEQEAAAAAQAAAAIAE0JhY2t1cCBU

TTpCYWNrdXAgVE0AAA4AFAAJAEIAYQBjAGsAdQBwACAAVABNAA8AFAAJAEIAYQBjAGsA

dQBwACAAVABNABIAAAATABIvVm9sdW1lcy9CYWNrdXAgVE3//wAA

</data>

<key>Destinations</key>

<array>

<dict>

<key>BackupAlias</key>

<data>

AAAAAAEmAAIAAQlCYWNrdXAgVE0AAAAAAAAAAAAAAAAAAAAAAADR

YAvESCsAAAAAAAEJQmFja3VwIFRNAAAAAAAAAAAAAAAAAAAAAAAA

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

AtFgC8QAAAAAAAAAAP////8AAAkAAAAAAAAAAAAAAAAAAAAACUJh

Y2t1cCBUTQAAEAAIAADRYEQEAAAAEQAIAADRYEQEAAAAAQAAAAIA

E0JhY2t1cCBUTTpCYWNrdXAgVE0AAA4AFAAJAEIAYQBjAGsAdQBw

ACAAVABNAA8AFAAJAEIAYQBjAGsAdQBwACAAVABNABIAAAATABIv

Vm9sdW1lcy9CYWNrdXAgVE3//wAA

</data>

<key>BytesAvailable</key>

<integer>460470657024</integer>

<key>BytesUsed</key>

<integer>539529342976</integer>

<key>DestinationID</key>

<string>DAE60618-F295-4F79-9C11-E13D378AAB99</string>

<key>DestinationUUIDs</key>

<array>

<string>1B7DA838-C825-310F-9B25-5165D4905CF4</string>

</array>

<key>LastKnownEncryptionState</key>

<string>NotEncrypted</string>

<key>RESULT</key>

<integer>0</integer>

<key>RootVolumeUUID</key>

<string>B6A3A69B-B749-3161-9AD2-5CB629F410A1</string>

</array>

</dict>

</array>

<key>ExcludeByPath</key>

<array>

<string>//Users/Shared/adi</string>

</array>

<key>HostUUIDs</key>

<array>

You have really been helpful BD but this is a tough one. I have unlocked the panel but no change. Logged in as another admin and no change.

In fact when I log in to a new account the company logo (from the company that I got the iMac from is emblazoned on the screen. Obviously they had some remote access to the computer, probably for backups, security, email etc. and they changed a bunch of preferences to dictate certain default behaviors. I found some preference files that had been duplicated and marked like .plist~original so that they could be restored. But there could be tons of these and I am technically savvy enough to fix them all. All in all the machine is running great and doing everything except auto backup. I probably should just leave it alone.

Thanks for all your help.

Awesome BD. I will try these things. I will also bring up all of these plist files on my old iMac (which should have the correct values) and see if there are differences that I can change on the newer Mac. If I figure it out I will let you know. Thanks again!