Send button is disabled or missing in Microsoft Outlook

CAUSE
This behavior can occur because the following files are corrupted:
· The Outcmd.dat file.
· The Extend.dat file.
· The Frmcache.dat file.

RESOLUTION

To resolve this behavior, rename the corrupted files and then run the
Detect and Repair utility to replace them. To do this, follow these
steps:

NOTE: Because there are several versions of Microsoft Windows, the
following steps may be different on your computer. If they are, see
your product documentation to complete these steps.

1. On the taskbar, click Start, and then click Search.
2. In the Search Results dialog box, click All files and folders under
Search Companion.
3. In the All or part of the file name box, type outcmd.dat, and then
click Search.
4. In the right-hand pane, right-click the Outcmd.dat file, and then
click Rename.
5. Type outcmd.old, and then press ENTER.
6. Repeat steps 2 to 4 to rename "Extend.dat" to "Extend.old" and
"Frmcache.dat" to "Frmcache.old."

extend.dat
frmcache.dat
outcmd.dat
views.dat (you may not have this file.)

7. Start Microsoft Outlook.
8. On the Help menu, click Detect and Repair.
9. In the Detect and Repair dialog box, click to select the Restore my
shortcuts while repairing check box, and then click Start. Follow the
instructions on your screen to complete the repair process. The Detect
and Repair utility recreates the files you renamed.