On 23 July 1914, the Austro-Hungarian Minister of Foreign Affairs Leopold Count Berchtold (pictured) sent a telegram to all the Austro-Hungarian Missions except the Signatory Embassies, the Balkan Legations, the Embassies in Madrid, Rome (Vatican), Washington, Tokyo, and Stockholm, which he had already notified (see two previous posts). In his telegram, he informs the Ambassadors of the delivery of the Austro-Hungarian ultimatum to Serbia to enable them to notify the governments they are accredited to.
Count Berchtold to all the Imperial and Royal Missions except the Signatory Embassies, the Balkan Legations, the Embassies in Madrid, Rome (Vatican), Washington, Tokyo, and Stockholm. Vienna, 23 July 1914.
The Imperial and Royal Minister in Belgrade today, Thursday 23 July 1914 presented a note to the Royal Servian government in which the latter is called upon to accept a number of demands within forty-eight hours, which we have been forced to address to it on the grounds of the results of the Sarajevo inquiry, hoping thereby to put an end at last to the plotting in our southern border provinces, the threads of which undeniably lead to Belgrade.
The above is for your information and for the direction of your speech.
Source: 1919 Austro-Hungarian Red Book, with minor edits.