We are currently running Maximo 7.5.0.4 on Internet Explorer 8. I understand that it is certified only to IE8, but was wondering if others were running on IE9 or IE10, as our company is looking at IE10 as the standard browser.

I have been using it in IE10 without much drama for the past 6 months. Just make sure you have put the maximo url's in the compatability list (push out using group policy).  We don't have much in the way of add-ons/plugins though.

IE 10 requires Maximo 7.5.0.3 or higher.

IE 11 requires Maximo 7.5.0.8 or higher.

Don't forget Java JRE versions and using Flash if you are using Linear in Maximo.

Microsoft Edge 20 requires Maximo 7.6.0.3 or higher, but does not support Java applets.

https://www.ibm.com/developerworks/community/groups/service/html/communityview?communityUuid=a9ba1efe-b731-4317-9724-a181d6155e3a#fullpageWidgetId=W5f281fe58c09_49c7_9fa4_e094f86b7e98&file=97d773e7-2177-4c0a-8b6b-170374718f9e