My Customer and I have had the idea to copy the MAC address of the VDSL router of a given site into the "NOTES" field of the MX appliance. But MAC addresses do contain UPPERCASE hex letters "A" to "F" sometimes. And funny enough you cannot search for these in the "Search Dashboard" function!
After an hour of trial and error, I have found the following that I'd like to share witch the community:
DO NOT USE ANY UPPERCASE LETTER IN THE SEARCH DASHBOARD FUNCTION!
You will not get a single match when searching...
I have reproduced this behavior on two different organizations and with a dozen of systematic test case, it's clearly a bug in my eyes. Therefore, I have both opened a case plus used "Make a Wish" in order to get rid of this.
(Try yourself or ask me for a set of screenshots in a PDF.)