Bornakk, Blizzard poster, informed World of Warcraft players of an extended maintenance on certain realms that may take up to 48 hours.  Prepare your guild schedule and inform your members in case of downtime.

Beginning Monday, August 13 at 11:55 PM PDT we will be performing maintenance on the following realms. This maintenance will be conducted as a means to optimize our World of Warcraft infrastructure for the associated realms, and is expected to last approximately 48 hours. Please note that during this time, some services such as the Armory or Paid Character Transfers may be unavailable. Your patience and understanding are appreciated.

Aggramar
Argent Dawn
Arthas
Azgalor
Bleeding Hollow
Bloodhoof
Burning Blade
Burning Legion
Durotan
Earthen Ring
Elune
Eonar
Eredar
Gilneas
Gorefiend
Kargath
Laughing Skull
Lightning’s Blade
Llane
Lothar
Madoran
Magtheridon
Malygos
Mannoroth
Medivh
Shadowmoon
Shattered Hand
Skullcrusher
Stormrage
Thunderhorn
Thunderlord
Trollbane
Warsong
Zul’jin