%% You should probably cite rfc8474 instead of this I-D.
@techreport{ietf-extra-imap-objectid-03,
    number =    {draft-ietf-extra-imap-objectid-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-extra-imap-objectid/03/},
    author =    {Bron Gondwana},
    title =     {{IMAP Extension for object identifiers}},
    pagetotal = 16,
    year =      2018,
    month =     may,
    day =       28,
    abstract =  {This document updates RFC3501 (IMAP4rev1) with persistent identifiers on mailboxes and messages to allow clients to more efficiently re-use cached data when resources have changed location on the server.},
}