There are a few things to consider.
Please note that IE 11 Enterprise Mode is being asked to emulate IE 8 which we support for this version of Maximo.
It is not a very popular option and our testing on this version is not as comprehensive as some other browser tests we do. We do, however, expect it to function similar to IE 8.
Some functionality does not function as expected in IE8. The list includes, but is not limited to:
1. Rich Text Fields (Rich Text editor is used in Long Description (LD) fields to format LD content in a rich format and could be used in custom reports that include a long description field. Communication templates, Bulletin Board and Emails are some of the other applications which could use Rich text).
2. Graphs on the Start Center
These problems are not fixed until the dojo framework change, which was implemented in Maximo 7508.
And - please also note that IE11 is fully supported from Maximo 126.96.36.199 onwards, as well as Maximo 7.6: