Adobe Reader XI, version 11.0.08. I have been using Adobe Reader since I got my new computer months ago and have had no problems. I use Windows 8. The comments icon is still on the toolbar, but the sign icon and tools icon no longer appear. Both appeared and worked great until yesterday, they were just missing.
Kindly try the steps below,
1) Try repairing the Adobe Reader installation through help>repair Adobe Reader installation and restart your machine.
2) Also, you can try deleting the following files located in the below mentioned location
Restart you System and launch Adobe Reader. Alternatively, you can uninstall and re-install the Adobe Reader.
I started having the same problem with my Adobe yesterday morning. The tools and sign options normally located at the left has disappeared from my adobe. Others in my workplace can still access it as normal... no matter what computer I sign in it still is missing, I have not changed any settings and I am actually glad to see there are others with this issue? how can we fix it?? I really need my tools in order to convert files each week.