With regards to using the name “Muhammad” when referring to the Messenger of Allaah sall Allaahu ‘alaihi wa sallam, Shaykh Muhammad ibn Saalih al ‘Uthaymeen rahimahullaah states:

And his (ibn Mas’ood radi Allaahu ‘anhu) statement:

Whoever wishes to look at the wasiyyah (emphasised command) of Muhammad sall Allaahu ‘alaiyhi wa sallam….

 Meaning: the Messenger of Allaah Muhammad ibn ‘Abdillaah al Haashimee al Qarashee sall Allaahu ‘alaihi wa sallam.

And this expression from ibn Mas’ood shows the permissibility of the like of it, such as for example:
“Muhammad, the Messenger of Allaah sall Allaahu ‘alaihi wa sallam said….”
and:
“The wasiyyah of Muhammad sall Allaahu ‘alaihi wa sallam….”

 And this does not contradict His statement, He the Most High:

<<Do not make the du’aa (calling) of the Messenger amongst yourselves like your calling one of another…>>
Soorah an Noor (24) aayah 63

 – because the du’aa of the Messenger here means munaadah (calling out to him). So do not say when calling out, “O Muhammad!” Rather say, “O Messenger of Allaah!”

As for informing (about something) then it is more encompassing than the issue of seeking (something from a person), so it is permissible for you to say, “I am a follower of Muhammad sall Allaahu ‘alaihi wa sallam,” or “O Allaah, send salaat upon Muhammad” or the like of that.

(Al qawl ul mufeed (1/44) of Shaykh Muhammad ibn Saalih al ‘Uthaymeen rahimahullaah, translated by Nasser ibn Najam)