I have an application that is using Ice 3.4 version and would like to upgrade it to Ice 3.7. What is the version of OMERO does Ice 3.7 uses?
Ice does not use OMERO, but OMERO is using Ice. Check out https://www.openmicroscopy.org/.
Note that all versions of Ice can communicate with one another: you can use Ice 3.7 to communicate with OMERO even if your version of OMERO uses an older version of Ice.
All the best,